'11-Up General QuestionsGeneral questions related to 2011-Up Super Duty trucks. If it doesn't fit the other categories, post it here. Gas engine discussion that pertains to all models is allowed. Specific gas engine questions should use the Gas Engines forum.

FAQWhy use Motorcraft DEF?
Motorcraft DEF is API certified meeting ISO22241 which is the only fluid approved and recommended by Ford Motor Company. Inferior product may result in costly damage to the SCR system. System damage as a result of inferior fluid is not eligible for warranty reimbursement. How is the vehicle filled with DEF?
The fluid is supplied through a fill port located next to the diesel fuel fill port; it has a blue cap clearly marked for diesel exhaust fluid. What is the capacity of the vehicle DEF tank?
The DEF tanks have a five to six gallon tank capacity, depending on the vehicle configuration.How frequently will DEF need to be replenished?
The system is designed to last approximately 7,500 miles between fill ups, coinciding with the oil & filter change interval. However depending on customer use, replenishment may need to occur more frequently. Is there a DEF tank level gauge?
The vehicle instrument cluster will provide indication of fluid level in the DEF tank, as well as provide warning messages when the DEF is low and needs to be refilled. Can the vehicle be operated without DEF?
The vehicle will not operate properly without DEF. When the vehicle DEF monitoring system detects no DEF is available, the vehicle initially goes into a speed limiting mode and then progresses into an idle only mode. How should DEF inventory be stored?
DEF should be stored out of direct sunlight in temperatures between 23F and 86F (-5C and 30C)

Freezing point is 12F (-11C)

Prolonged storage at higher temperatures will cause DEF to breakdown reducing shelf life

Storing DEF at 86F reduces shelf life to approximately 12 months

Can DEF freeze in the vehicle?
Yes. However, Ford Motor Company vehicles have a tank and line heater to ensure the vehicle operates in extremely cold climates.

I bought 2-2 gallon (4 gallons total) jugs of DEF at the local Hino dealer a week or so ago for the whopping sum of $17.83.

That sounds a little more like reality...

Not too far down the road from me is one of the first truck stops in the US to get a DEF pump and it was $2.79 a gallon the last time I stopped by. At $9 a gallon from the dealer that is going to be a hard sell. Then again $9 a gallon is a far cry from the ~$30 a QUART laboratory grade DEF that is being used in the test vehicles...

Sound slike antifreeze. I can buy the red Texaco Extended life for $10 jug or pay $30 for the Ford Gold.

The funny part is that Ford/Volvo/Mack/Daimler Trucks/Hino etc. are all getting their DEF from Terra Environmental Technologies Inc. but I am sure someone is going to come on here telling people that the Motorcraft stuff is "better"...

The funny part is that Ford/Volvo/Mack/Daimler Trucks/Hino etc. are all getting their DEF from Terra Environmental Technologies Inc. but I am sure someone is going to come on here telling people that the Motorcraft stuff is "better"...

yes they are the company their main plant that makes it is a company subsidiary out of medicine hat (cant remember the name ) it is the worlds largest producer of urea product it supplied 92% of world market this was told to us in a freightliner course they had a tech from the manufacturer there they even make it for mercedes

That's what my dealer in Brockville, Ontario wants for it. Parts are definitely cheaper on your side of the border. Thats why I pick up oil filters and cetane boost when I am in Indiana. I have to say though that my dealer treats me very well. My truck has a minor puking problem and they have been giving me the antifreeze since last summer until I get the truck back into them to try to figure it out again. Thay have given me 4 or 5 jugs of it so thats the best price of all!

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